Solvents for use in the treatment of lignin-containing...

Details Solvents for use in the treatment of lignin-containing... Solvents for use in the treatment of lignin-containing...

D - Textiles, Paper

21

C

D21C 3/04 (2006.01)

Patent

CA 2534619

A method for the treatment of a lignin-containing material such as wood pulp, bagasse and other plant-derived materials, comprising contacting the lignin- containing material with an ionic liquid to extract the lignin therefrom. The ionic liquid is suitably a substituted or unsubstituted imidazolium, triazolium, pyrazolium, pyridinium, pyrrolidinium, piperidinium, ammonium, phosphonium or sulfonium salt of a substituted or unsubstituted aryl sulfonate, such as an ionic liquid salt of a xylene sulfonate.

L'invention concerne un procédé permettant de traiter une matière contenant de la lignine, telle que la pâte de bois, la bagasse et d'autres matières dérivées de végétaux. Ledit procédé consiste à mettre la matière contenant de la lignine en contact avec un liquide ionique afin d'en extraire la lignine. Le liquide ionique qui convient est un imidazolium, un triazolium, un pyrazolium, un pyridinium, un pyrrolidinium, un piperidinium, un ammonium, un phosphonium substitués ou non substitués, ou un sel de sulfonium de sulfonate d'aryle substitué ou non substitué, tel qu'un sel de liquide ionique de sulfonate de xylène.

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